//===----------------------------------------------------------------------===//
#include "llvm/Attributes.h"
+#include "LLVMContextImpl.h"
#include "llvm/Type.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/ADT/FoldingSet.h"
-#include "llvm/System/Atomic.h"
-#include "llvm/System/Mutex.h"
+#include "llvm/Support/Atomic.h"
+#include "llvm/Support/Mutex.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/ManagedStatic.h"
#include "llvm/Support/raw_ostream.h"
using namespace llvm;
//===----------------------------------------------------------------------===//
-// Attribute Function Definitions
+// Attributes Implementation
//===----------------------------------------------------------------------===//
-std::string Attribute::getAsString(Attributes Attrs) {
+Attributes::Attributes(uint64_t Val) : Attrs(Val) {}
+
+Attributes::Attributes(LLVMContext &C, AttrVal Val)
+ : Attrs(Attributes::get(Attributes::Builder().addAttribute(Val)).Attrs) {}
+
+Attributes::Attributes(AttributesImpl *A) : Attrs(A->Bits) {}
+
+Attributes::Attributes(const Attributes &A) : Attrs(A.Attrs) {}
+
+// FIXME: This is temporary until we have implemented the uniquified version of
+// AttributesImpl.
+Attributes Attributes::get(Attributes::Builder &B) {
+ return Attributes(B.Bits);
+}
+
+Attributes Attributes::get(LLVMContext &Context, Attributes::Builder &B) {
+ // If there are no attributes, return an empty Attributes class.
+ if (B.Bits == 0)
+ return Attributes();
+
+ // Otherwise, build a key to look up the existing attributes.
+ LLVMContextImpl *pImpl = Context.pImpl;
+ FoldingSetNodeID ID;
+ ID.AddInteger(B.Bits);
+
+ void *InsertPoint;
+ AttributesImpl *PA = pImpl->AttrsSet.FindNodeOrInsertPos(ID, InsertPoint);
+
+ if (!PA) {
+ // If we didn't find any existing attributes of the same shape then create a
+ // new one and insert it.
+ PA = new AttributesImpl(B.Bits);
+ pImpl->AttrsSet.InsertNode(PA, InsertPoint);
+ }
+
+ // Return the AttributesList that we found or created.
+ return Attributes(PA);
+}
+
+bool Attributes::hasAttribute(AttrVal Val) const {
+ return Attrs.hasAttribute(Val);
+}
+
+bool Attributes::hasAttributes(const Attributes &A) const {
+ return Attrs.hasAttributes(A);
+}
+
+/// This returns the alignment field of an attribute as a byte alignment value.
+unsigned Attributes::getAlignment() const {
+ if (!hasAttribute(Attributes::Alignment))
+ return 0;
+ return 1U << ((Attrs.getAlignment() >> 16) - 1);
+}
+
+/// This returns the stack alignment field of an attribute as a byte alignment
+/// value.
+unsigned Attributes::getStackAlignment() const {
+ if (!hasAttribute(Attributes::StackAlignment))
+ return 0;
+ return 1U << ((Attrs.getStackAlignment() >> 26) - 1);
+}
+
+bool Attributes::isEmptyOrSingleton() const {
+ return Attrs.isEmptyOrSingleton();
+}
+
+uint64_t Attributes::Raw() const {
+ return Attrs.Bits;
+}
+
+Attributes Attributes::typeIncompatible(Type *Ty) {
+ Attributes::Builder Incompatible;
+
+ if (!Ty->isIntegerTy())
+ // Attributes that only apply to integers.
+ Incompatible.addAttribute(Attributes::SExt)
+ .addAttribute(Attributes::ZExt);
+
+ if (!Ty->isPointerTy())
+ // Attributes that only apply to pointers.
+ Incompatible.addAttribute(Attributes::ByVal)
+ .addAttribute(Attributes::Nest)
+ .addAttribute(Attributes::NoAlias)
+ .addAttribute(Attributes::NoCapture)
+ .addAttribute(Attributes::StructRet);
+
+ return Attributes(Incompatible.Bits); // FIXME: Use Attributes::get().
+}
+
+std::string Attributes::getAsString() const {
std::string Result;
- if (Attrs & Attribute::ZExt)
+ if (hasAttribute(Attributes::ZExt))
Result += "zeroext ";
- if (Attrs & Attribute::SExt)
+ if (hasAttribute(Attributes::SExt))
Result += "signext ";
- if (Attrs & Attribute::NoReturn)
+ if (hasAttribute(Attributes::NoReturn))
Result += "noreturn ";
- if (Attrs & Attribute::NoUnwind)
+ if (hasAttribute(Attributes::NoUnwind))
Result += "nounwind ";
- if (Attrs & Attribute::InReg)
+ if (hasAttribute(Attributes::UWTable))
+ Result += "uwtable ";
+ if (hasAttribute(Attributes::ReturnsTwice))
+ Result += "returns_twice ";
+ if (hasAttribute(Attributes::InReg))
Result += "inreg ";
- if (Attrs & Attribute::NoAlias)
+ if (hasAttribute(Attributes::NoAlias))
Result += "noalias ";
- if (Attrs & Attribute::NoCapture)
+ if (hasAttribute(Attributes::NoCapture))
Result += "nocapture ";
- if (Attrs & Attribute::StructRet)
+ if (hasAttribute(Attributes::StructRet))
Result += "sret ";
- if (Attrs & Attribute::ByVal)
+ if (hasAttribute(Attributes::ByVal))
Result += "byval ";
- if (Attrs & Attribute::Nest)
+ if (hasAttribute(Attributes::Nest))
Result += "nest ";
- if (Attrs & Attribute::ReadNone)
+ if (hasAttribute(Attributes::ReadNone))
Result += "readnone ";
- if (Attrs & Attribute::ReadOnly)
+ if (hasAttribute(Attributes::ReadOnly))
Result += "readonly ";
- if (Attrs & Attribute::OptimizeForSize)
+ if (hasAttribute(Attributes::OptimizeForSize))
Result += "optsize ";
- if (Attrs & Attribute::NoInline)
+ if (hasAttribute(Attributes::NoInline))
Result += "noinline ";
- if (Attrs & Attribute::InlineHint)
+ if (hasAttribute(Attributes::InlineHint))
Result += "inlinehint ";
- if (Attrs & Attribute::AlwaysInline)
+ if (hasAttribute(Attributes::AlwaysInline))
Result += "alwaysinline ";
- if (Attrs & Attribute::StackProtect)
+ if (hasAttribute(Attributes::StackProtect))
Result += "ssp ";
- if (Attrs & Attribute::StackProtectReq)
+ if (hasAttribute(Attributes::StackProtectReq))
Result += "sspreq ";
- if (Attrs & Attribute::NoRedZone)
+ if (hasAttribute(Attributes::NoRedZone))
Result += "noredzone ";
- if (Attrs & Attribute::NoImplicitFloat)
+ if (hasAttribute(Attributes::NoImplicitFloat))
Result += "noimplicitfloat ";
- if (Attrs & Attribute::Naked)
+ if (hasAttribute(Attributes::Naked))
Result += "naked ";
- if (Attrs & Attribute::StackAlignment) {
+ if (hasAttribute(Attributes::NonLazyBind))
+ Result += "nonlazybind ";
+ if (hasAttribute(Attributes::AddressSafety))
+ Result += "address_safety ";
+ if (hasAttribute(Attributes::StackAlignment)) {
Result += "alignstack(";
- Result += utostr(Attribute::getStackAlignmentFromAttrs(Attrs));
+ Result += utostr(getStackAlignment());
Result += ") ";
}
- if (Attrs & Attribute::Alignment) {
+ if (hasAttribute(Attributes::Alignment)) {
Result += "align ";
- Result += utostr(Attribute::getAlignmentFromAttrs(Attrs));
+ Result += utostr(getAlignment());
Result += " ";
}
// Trim the trailing space.
return Result;
}
-Attributes Attribute::typeIncompatible(const Type *Ty) {
- Attributes Incompatible = None;
-
- if (!Ty->isInteger())
- // Attributes that only apply to integers.
- Incompatible |= SExt | ZExt;
-
- if (!isa<PointerType>(Ty))
- // Attributes that only apply to pointers.
- Incompatible |= ByVal | Nest | NoAlias | StructRet | NoCapture;
-
- return Incompatible;
+//===----------------------------------------------------------------------===//
+// Attributes::Builder Implementation
+//===----------------------------------------------------------------------===//
+
+Attributes::Builder &Attributes::Builder::
+addAttribute(Attributes::AttrVal Val) {
+ Bits |= AttributesImpl::getAttrMask(Val);
+ return *this;
+}
+
+Attributes::Builder &Attributes::Builder::addRawValue(uint64_t Val) {
+ Bits |= Val;
+ return *this;
+}
+
+Attributes::Builder &Attributes::Builder::addAlignmentAttr(unsigned Align) {
+ if (Align == 0) return *this;
+ assert(isPowerOf2_32(Align) && "Alignment must be a power of two.");
+ assert(Align <= 0x40000000 && "Alignment too large.");
+ Bits |= (Log2_32(Align) + 1) << 16;
+ return *this;
+}
+Attributes::Builder &Attributes::Builder::addStackAlignmentAttr(unsigned Align){
+ // Default alignment, allow the target to define how to align it.
+ if (Align == 0) return *this;
+ assert(isPowerOf2_32(Align) && "Alignment must be a power of two.");
+ assert(Align <= 0x100 && "Alignment too large.");
+ Bits |= (Log2_32(Align) + 1) << 26;
+ return *this;
+}
+
+Attributes::Builder &Attributes::Builder::
+removeAttribute(Attributes::AttrVal Val) {
+ Bits &= ~AttributesImpl::getAttrMask(Val);
+ return *this;
+}
+
+Attributes::Builder &Attributes::Builder::addAttributes(const Attributes &A) {
+ Bits |= A.Raw();
+ return *this;
+}
+
+Attributes::Builder &Attributes::Builder::removeAttributes(const Attributes &A){
+ Bits &= ~A.Raw();
+ return *this;
+}
+
+bool Attributes::Builder::hasAttribute(Attributes::AttrVal A) const {
+ return Bits & AttributesImpl::getAttrMask(A);
+}
+
+bool Attributes::Builder::hasAttributes() const {
+ return Bits != 0;
+}
+bool Attributes::Builder::hasAttributes(const Attributes &A) const {
+ return Bits & A.Raw();
+}
+bool Attributes::Builder::hasAlignmentAttr() const {
+ return Bits & AttributesImpl::getAttrMask(Attributes::Alignment);
+}
+
+uint64_t Attributes::Builder::getAlignment() const {
+ if (!hasAlignmentAttr())
+ return 0;
+ return 1U <<
+ (((Bits & AttributesImpl::getAttrMask(Attributes::Alignment)) >> 16) - 1);
+}
+
+uint64_t Attributes::Builder::getStackAlignment() const {
+ if (!hasAlignmentAttr())
+ return 0;
+ return 1U <<
+ (((Bits & AttributesImpl::getAttrMask(Attributes::StackAlignment))>>26)-1);
+}
+
+//===----------------------------------------------------------------------===//
+// AttributeImpl Definition
+//===----------------------------------------------------------------------===//
+
+uint64_t AttributesImpl::getAttrMask(uint64_t Val) {
+ switch (Val) {
+ case Attributes::None: return 0;
+ case Attributes::ZExt: return 1 << 0;
+ case Attributes::SExt: return 1 << 1;
+ case Attributes::NoReturn: return 1 << 2;
+ case Attributes::InReg: return 1 << 3;
+ case Attributes::StructRet: return 1 << 4;
+ case Attributes::NoUnwind: return 1 << 5;
+ case Attributes::NoAlias: return 1 << 6;
+ case Attributes::ByVal: return 1 << 7;
+ case Attributes::Nest: return 1 << 8;
+ case Attributes::ReadNone: return 1 << 9;
+ case Attributes::ReadOnly: return 1 << 10;
+ case Attributes::NoInline: return 1 << 11;
+ case Attributes::AlwaysInline: return 1 << 12;
+ case Attributes::OptimizeForSize: return 1 << 13;
+ case Attributes::StackProtect: return 1 << 14;
+ case Attributes::StackProtectReq: return 1 << 15;
+ case Attributes::Alignment: return 31 << 16;
+ case Attributes::NoCapture: return 1 << 21;
+ case Attributes::NoRedZone: return 1 << 22;
+ case Attributes::NoImplicitFloat: return 1 << 23;
+ case Attributes::Naked: return 1 << 24;
+ case Attributes::InlineHint: return 1 << 25;
+ case Attributes::StackAlignment: return 7 << 26;
+ case Attributes::ReturnsTwice: return 1 << 29;
+ case Attributes::UWTable: return 1 << 30;
+ case Attributes::NonLazyBind: return 1U << 31;
+ case Attributes::AddressSafety: return 1ULL << 32;
+ }
+ llvm_unreachable("Unsupported attribute type");
+}
+
+bool AttributesImpl::hasAttribute(uint64_t A) const {
+ return (Bits & getAttrMask(A)) != 0;
+}
+
+bool AttributesImpl::hasAttributes() const {
+ return Bits != 0;
+}
+
+bool AttributesImpl::hasAttributes(const Attributes &A) const {
+ return Bits & A.Raw(); // FIXME: Raw() won't work here in the future.
+}
+
+uint64_t AttributesImpl::getAlignment() const {
+ return Bits & getAttrMask(Attributes::Alignment);
+}
+
+uint64_t AttributesImpl::getStackAlignment() const {
+ return Bits & getAttrMask(Attributes::StackAlignment);
+}
+
+bool AttributesImpl::isEmptyOrSingleton() const {
+ return (Bits & (Bits - 1)) == 0;
}
//===----------------------------------------------------------------------===//
//===----------------------------------------------------------------------===//
namespace llvm {
+ class AttributeListImpl;
+}
+
+static ManagedStatic<FoldingSet<AttributeListImpl> > AttributesLists;
+
+namespace llvm {
+static ManagedStatic<sys::SmartMutex<true> > ALMutex;
+
class AttributeListImpl : public FoldingSetNode {
sys::cas_flag RefCount;
// AttributesList is uniqued, these should not be publicly available.
- void operator=(const AttributeListImpl &); // Do not implement
- AttributeListImpl(const AttributeListImpl &); // Do not implement
+ void operator=(const AttributeListImpl &) LLVM_DELETED_FUNCTION;
+ AttributeListImpl(const AttributeListImpl &) LLVM_DELETED_FUNCTION;
~AttributeListImpl(); // Private implementation
public:
SmallVector<AttributeWithIndex, 4> Attrs;
- AttributeListImpl(const AttributeWithIndex *Attr, unsigned NumAttrs)
- : Attrs(Attr, Attr+NumAttrs) {
+ AttributeListImpl(ArrayRef<AttributeWithIndex> attrs)
+ : Attrs(attrs.begin(), attrs.end()) {
RefCount = 0;
}
- void AddRef() { sys::AtomicIncrement(&RefCount); }
+ void AddRef() {
+ sys::SmartScopedLock<true> Lock(*ALMutex);
+ ++RefCount;
+ }
void DropRef() {
- sys::cas_flag old = sys::AtomicDecrement(&RefCount);
- if (old == 0) delete this;
+ sys::SmartScopedLock<true> Lock(*ALMutex);
+ if (!AttributesLists.isConstructed())
+ return;
+ sys::cas_flag new_val = --RefCount;
+ if (new_val == 0)
+ delete this;
}
void Profile(FoldingSetNodeID &ID) const {
- Profile(ID, Attrs.data(), Attrs.size());
+ Profile(ID, Attrs);
}
- static void Profile(FoldingSetNodeID &ID, const AttributeWithIndex *Attr,
- unsigned NumAttrs) {
- for (unsigned i = 0; i != NumAttrs; ++i)
- ID.AddInteger(uint64_t(Attr[i].Attrs) << 32 | unsigned(Attr[i].Index));
+ static void Profile(FoldingSetNodeID &ID, ArrayRef<AttributeWithIndex> Attrs){
+ for (unsigned i = 0, e = Attrs.size(); i != e; ++i) {
+ ID.AddInteger(Attrs[i].Attrs.Raw());
+ ID.AddInteger(Attrs[i].Index);
+ }
}
};
}
-static ManagedStatic<sys::SmartMutex<true> > ALMutex;
-static ManagedStatic<FoldingSet<AttributeListImpl> > AttributesLists;
-
AttributeListImpl::~AttributeListImpl() {
- sys::SmartScopedLock<true> Lock(*ALMutex);
+ // NOTE: Lock must be acquired by caller.
AttributesLists->RemoveNode(this);
}
-AttrListPtr AttrListPtr::get(const AttributeWithIndex *Attrs, unsigned NumAttrs) {
+AttrListPtr AttrListPtr::get(ArrayRef<AttributeWithIndex> Attrs) {
// If there are no attributes then return a null AttributesList pointer.
- if (NumAttrs == 0)
+ if (Attrs.empty())
return AttrListPtr();
#ifndef NDEBUG
- for (unsigned i = 0; i != NumAttrs; ++i) {
- assert(Attrs[i].Attrs != Attribute::None &&
+ for (unsigned i = 0, e = Attrs.size(); i != e; ++i) {
+ assert(Attrs[i].Attrs.hasAttributes() &&
"Pointless attribute!");
assert((!i || Attrs[i-1].Index < Attrs[i].Index) &&
"Misordered AttributesList!");
// Otherwise, build a key to look up the existing attributes.
FoldingSetNodeID ID;
- AttributeListImpl::Profile(ID, Attrs, NumAttrs);
+ AttributeListImpl::Profile(ID, Attrs);
void *InsertPos;
sys::SmartScopedLock<true> Lock(*ALMutex);
// If we didn't find any existing attributes of the same shape then
// create a new one and insert it.
if (!PAL) {
- PAL = new AttributeListImpl(Attrs, NumAttrs);
+ PAL = new AttributeListImpl(Attrs);
AttributesLists->InsertNode(PAL, InsertPos);
}
}
const AttrListPtr &AttrListPtr::operator=(const AttrListPtr &RHS) {
+ sys::SmartScopedLock<true> Lock(*ALMutex);
if (AttrList == RHS.AttrList) return *this;
if (AttrList) AttrList->DropRef();
AttrList = RHS.AttrList;
/// returned. Attributes for the result are denoted with Idx = 0.
/// Function notes are denoted with idx = ~0.
Attributes AttrListPtr::getAttributes(unsigned Idx) const {
- if (AttrList == 0) return Attribute::None;
+ if (AttrList == 0) return Attributes();
const SmallVector<AttributeWithIndex, 4> &Attrs = AttrList->Attrs;
for (unsigned i = 0, e = Attrs.size(); i != e && Attrs[i].Index <= Idx; ++i)
if (Attrs[i].Index == Idx)
return Attrs[i].Attrs;
- return Attribute::None;
+
+ return Attributes();
}
/// hasAttrSomewhere - Return true if the specified attribute is set for at
/// least one parameter or for the return value.
-bool AttrListPtr::hasAttrSomewhere(Attributes Attr) const {
+bool AttrListPtr::hasAttrSomewhere(Attributes::AttrVal Attr) const {
if (AttrList == 0) return false;
-
+
const SmallVector<AttributeWithIndex, 4> &Attrs = AttrList->Attrs;
for (unsigned i = 0, e = Attrs.size(); i != e; ++i)
- if (Attrs[i].Attrs & Attr)
+ if (Attrs[i].Attrs.hasAttribute(Attr))
return true;
return false;
}
+unsigned AttrListPtr::getNumAttrs() const {
+ return AttrList ? AttrList->Attrs.size() : 0;
+}
+
+Attributes &AttrListPtr::getAttributesAtIndex(unsigned i) const {
+ assert(AttrList && "Trying to get an attribute from an empty list!");
+ assert(i < AttrList->Attrs.size() && "Index out of range!");
+ return AttrList->Attrs[i].Attrs;
+}
-AttrListPtr AttrListPtr::addAttr(unsigned Idx, Attributes Attrs) const {
+AttrListPtr AttrListPtr::addAttr(LLVMContext &C, unsigned Idx,
+ Attributes Attrs) const {
Attributes OldAttrs = getAttributes(Idx);
#ifndef NDEBUG
// FIXME it is not obvious how this should work for alignment.
// For now, say we can't change a known alignment.
- Attributes OldAlign = OldAttrs & Attribute::Alignment;
- Attributes NewAlign = Attrs & Attribute::Alignment;
+ unsigned OldAlign = OldAttrs.getAlignment();
+ unsigned NewAlign = Attrs.getAlignment();
assert((!OldAlign || !NewAlign || OldAlign == NewAlign) &&
"Attempt to change alignment!");
#endif
- Attributes NewAttrs = OldAttrs | Attrs;
- if (NewAttrs == OldAttrs)
+ Attributes::Builder NewAttrs =
+ Attributes::Builder(OldAttrs).addAttributes(Attrs);
+ if (NewAttrs == Attributes::Builder(OldAttrs))
return *this;
SmallVector<AttributeWithIndex, 8> NewAttrList;
// If there are attributes already at this index, merge them in.
if (i != e && OldAttrList[i].Index == Idx) {
- Attrs |= OldAttrList[i].Attrs;
+ Attrs =
+ Attributes::get(Attributes::Builder(Attrs).
+ addAttributes(OldAttrList[i].Attrs));
++i;
}
OldAttrList.begin()+i, OldAttrList.end());
}
- return get(NewAttrList.data(), NewAttrList.size());
+ return get(NewAttrList);
}
-AttrListPtr AttrListPtr::removeAttr(unsigned Idx, Attributes Attrs) const {
+AttrListPtr AttrListPtr::removeAttr(LLVMContext &C, unsigned Idx,
+ Attributes Attrs) const {
#ifndef NDEBUG
// FIXME it is not obvious how this should work for alignment.
// For now, say we can't pass in alignment, which no current use does.
- assert(!(Attrs & Attribute::Alignment) && "Attempt to exclude alignment!");
+ assert(!Attrs.hasAttribute(Attributes::Alignment) &&
+ "Attempt to exclude alignment!");
#endif
if (AttrList == 0) return AttrListPtr();
Attributes OldAttrs = getAttributes(Idx);
- Attributes NewAttrs = OldAttrs & ~Attrs;
- if (NewAttrs == OldAttrs)
+ Attributes::Builder NewAttrs =
+ Attributes::Builder(OldAttrs).removeAttributes(Attrs);
+ if (NewAttrs == Attributes::Builder(OldAttrs))
return *this;
SmallVector<AttributeWithIndex, 8> NewAttrList;
// If there are attributes already at this index, merge them in.
assert(OldAttrList[i].Index == Idx && "Attribute isn't set?");
- Attrs = OldAttrList[i].Attrs & ~Attrs;
+ Attrs = Attributes::get(Attributes::Builder(OldAttrList[i].Attrs).
+ removeAttributes(Attrs));
++i;
if (Attrs) // If any attributes left for this parameter, add them.
NewAttrList.push_back(AttributeWithIndex::get(Idx, Attrs));
NewAttrList.insert(NewAttrList.end(),
OldAttrList.begin()+i, OldAttrList.end());
- return get(NewAttrList.data(), NewAttrList.size());
+ return get(NewAttrList);
}
void AttrListPtr::dump() const {
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